"The Army Air Force Statistical Digest (World War II), published by the Office of Statistical Control, Headquarters, Army Air Forces, makes available in one volume and on a uniform basis summary statistics on AAF personnel, aircraft, equipment, combat operations and other activities during World War II.
Since March 1942, the Office of Statistical Control has been charged with the responsibility for collecting, processing, analyzing and presenting statistics on all phases of AAF strength and activity. It has been the practice to make these data available to interested offices in the form of recurring and special reports. The summary statistics published in this volume were derived from these reports and from the more detailed information available in the files of the Office of Statistical Control. Unless otherwise indicated, the statistics cover the strength and operations of the Army Air Forces only. In a few cases where combinations have been made with other Army and Navy figures, the coverage and character of the data have been clearly noted. While most of the statistics included here are monthly for the period Pearl Harbor to V-J Day, a few important series are carried back for a longer period."
Digitized by http://www.afhso.af.mil/